I had the same problem of getting my a$$ seriously kicked (don't remember what kind of cigar it was) like that once. Nausea, dizzy, and generally felt like doom was near...some stuff I read afterwards pointed me towards nicotine overdose. Apparently (trivia time), a pack of cigarettes contains enough nicotine to kill you - but much of the nicotine is lost due to the smoke, and not absorbed as fully into your body. And since some cigars can have more tobacco than an entire pack of cigarettes...do the math.